數(shù)詞的用法
    數(shù)詞分基數(shù)詞和序數(shù)詞?；鶖?shù)詞表示數(shù)目，序數(shù)詞表示順序。
    1. 基數(shù)詞的用法
    (1) 基數(shù)詞在句中主要用作主語、賓語、定語、表語、同位語，例如：
    Thirty of them are Party members.(主語)
    --- How many would you like?
    --- Three ，please.(作賓語)
    The nine boys are from Tianjing.(定語)
    Six plus four is ten.(表語)
    We four will go with you.(同位語)
    (2) 表示一個具體數(shù)字時，hundred， thousand， million一律不用復數(shù);在表示一個不確定數(shù)字時則用復數(shù)。例如：
    Our country has a population of 1，300 million people.
    There are three thousand students in our school.
    After the war， thousands of people became homeless.
    Maize is the most important food crop for millions of people in the world.
    They arrived in twos and threes.
    (3) 表示“……十”的數(shù)詞的復數(shù)形式可用來表示人的歲數(shù)或年代，例如：
    He is in his early thirties.
    He died still in his forties.
    This took place in 1930s.
    (4) 表示時刻用基數(shù)詞。例如：
    We get up at six.
    The workers begin work at eight.
    表示“幾點過幾分”，用介詞past，但須在半小時以內(nèi)。例如：
    ten past ten，
    a quarter past nine，
    half past twelve
    表示“幾點差幾分”用介詞to， 但分數(shù)須在半小時以上。例如：
    twenty to nine，
    five to eight，
    a quarter to ten
    表示“幾點幾分”還可直接用基數(shù)詞。例如：
    seven fifteen，
    eleven thirty，
    nine twenty
    

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